Finding the Fourth Proportional to 59,989.50, 89,985.06 and 18,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,989.50 : 89,985.06 = 18,436.50 : x
2. Step 2: Convert to fraction form
   59,989.50/89,985.06 = 18,436.50/x
3. Step 3: Cross multiply
   59,989.50x = 89,985.06 × 18,436.50
4. Step 4: Simplify right side
   59,989.50x = 1,659,009,558.69
5. Step 5: Solve for x
   x = 1,659,009,558.69/59,989.50
6. Step 6: Final answer
   x = 27,655.00